Carriage-jack



' A. ZIMMERMAN.

CARRIAGE JACK.

No. 406,381. Patented July 2, 1889..

UNITED STATES PATENT OFFICE.

ARTHUR ZIMMERMAN, OF ST. LOUIS, MISSOURI.

CARRIAG E-JAC K.

SPECIFICATION forming part of Letters Patent No. 406,381, dated. July 2,1889.

Application filed February 14, 1889. Serial No. 299,828. (No model.)

To all whom it may 0072007 71.-

Be it known that I, ARTHUR ZIMMERMAN, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful Improvement inCarriage-Jacks, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification.

This belongs to the class of jacks in which the lever takes suchposition, when down, as to sustain the liftingframe without any otherlocking device.

Figure I is a perspective view of the jack. Figs. II and III'are detailsections, showing the parts in different positions. Fig. IV is a detailside View.

1 is the foot.

2 is the standard.

3 is the lifting-frame, having a number of steps 4, for engagementbeneath the axle of a carriage, wagon, or other wheeled vehicle ormachine. The lifting-frame has flanges 5, which are engaged byhookedlugs 6 cast upon or otherwise attached to the standard, such lugsforming guides for the lifting-frame in its vertical movements.

7 is a screw or stud, which limits the ascent of the lifting-frame bycontact with one of the lugs 6.

8 is a hand-lever, whose end is pivoted at 9 to a lug 10 on the upwardprojection 3 of the lifting-frame, the end of the lever being slotted at11 to receive the lug and to give place to a horn 12, which projectsfrom the upper part of the standard. The upper side of the horn isinclined upwardly from the standard and gives bearing to a fulcrum-pin13, which moves endwise on the born as the lever is operated to lift orlower the frame 3. The inclination of the bearing-edge of the horn 12and relative position of the pivot 9 and pin 13 are such that when thelever is in its lower position, as seen in Figs. I and III, it serves tohold up the lifting-frame, as no amount of weight upon the frame willslide the fulcrum-pin 13 up the inclined horn 12.

In Fig. IV the fulcrum-pin 13 carries an anti-friction roller 14, whichruns on the horn 12 in raising and lowering the lifting-frame. Therelative position of parts andinclination 0f the horn are such that whenthe lever 8 is in the lowerposition the frame 3 is sustained, as beforedescribed.

I claim as my invention- 1. The combination of the standard 2,'having ahorn 12 at its upper end formed with an inclined upper side, thelifting-frame 3, having an upward projection 3, provided with a lug 10,and the lever 8, formed with a slot 11, through which the horn projects,-pivoted to the lug and provided with a fulcrumpin 13, substantially asdescribed.

2. The combination of the standard 2, having a horn 12 at its upper endformed with an inclined upper side, and hooked lugs 6, the lifting-frame3, having flanges 5, upward projection 3", and lug 10, and the lever 8,having slot 11 pivoted to the lug and provided with a fulcrum-pin 13,substantially as described.

ARTHUR ZIMMERMAN.

In presence of EDW. S. KNIGHT, THOMAS KNIGHT.

